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Here is the link that will take you to the bobbin Byron speaks of. http://jvice.com/pages/news.html

From looking at the picture I would think that a lot of friction is created where the thread enters the tube.

I have several of the ceramic Rite Bobbins when Merco in Sunnyvale, CA still owned and manufactured them. They are an excellent bobbins and to control the wobble when spinning just place the thread...